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Position a sturdy step ladder directly under the header bracket. Carefully lift the assembled rail and motor unit, connecting the end of the rail (the part without the motor) to the header bracket using the supplied clevis pin and loop. Ensure the pin is securely inserted. Next, carefully lift the motor unit end and place it onto the step ladder to support its weight. The goal at this stage is to initially suspend the opener so it is approximately level and perpendicular to the garage door. The instructor then uses a strap or rope to temporarily hang the motor unit from a ceiling joist, ensuring it stays out of the way for the next steps.